Environmental

Asbestos-containing materials (ACM) found in a building are most dangerous when:

AThe materials are intact and undisturbed
BThe materials are friable (crumbling) and releasing airborne fibers✓ Correct
CThey are located in the basement only
DThe building is over 100 years old

Explanation

Asbestos is most hazardous when it is friable — crumbling or damaged — releasing microscopic fibers into the air. Intact, well-maintained ACM poses lower risk and may be managed in place.

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